Across
- 3. The process of adding a number
- 5. The process of taking away a number
- 7. The standard unit of measurement in the metric system
- 8. The unlucky number
Down
- 1. Used to solve algebra
- 2. 3.14159265358979323 8462643383279502
- 4. What is the 999th digit of pi
- 6. 6 Squared